GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 15 Jan 2019, 17:59

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### The winning strategy for a high GRE score

January 17, 2019

January 17, 2019

08:00 AM PST

09:00 AM PST

Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.

# What is the sum of all the integers from 1 to 80, inclusive?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 52108
What is the sum of all the integers from 1 to 80, inclusive?  [#permalink]

### Show Tags

30 Aug 2018, 23:03
00:00

Difficulty:

15% (low)

Question Stats:

80% (00:44) correct 20% (01:02) wrong based on 50 sessions

### HideShow timer Statistics

What is the sum of all the integers from 1 to 80, inclusive?

(A) 3,200
(B) 3,210
(C) 3,230
(D) 3,240
(E) 3,450

_________________
Director
Joined: 18 Jul 2018
Posts: 550
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Re: What is the sum of all the integers from 1 to 80, inclusive?  [#permalink]

### Show Tags

30 Aug 2018, 23:13
Sum of the integers from 1-80 is given by n(n+1)/2.

N=80

Sum = 80*81/2 = 40*81 = 3240.

Posted from my mobile device
_________________

If you are not badly hurt, you don't learn. If you don't learn, you don't grow. If you don't grow, you don't live. If you don't live, you don't know your worth. If you don't know your worth, then what's the point?

Director
Joined: 20 Feb 2015
Posts: 795
Concentration: Strategy, General Management
What is the sum of all the integers from 1 to 80, inclusive?  [#permalink]

### Show Tags

30 Aug 2018, 23:45
Bunuel wrote:
What is the sum of all the integers from 1 to 80, inclusive?

(A) 3,200
(B) 3,210
(C) 3,230
(D) 3,240
(E) 3,450

sum of 1st n terms = $$\frac{n(n+1)}{2}$$
$$\frac{80*81}{2}$$ = 3240
D
What is the sum of all the integers from 1 to 80, inclusive? &nbs [#permalink] 30 Aug 2018, 23:45
Display posts from previous: Sort by